Results 211 to 220 of about 443,084 (256)
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1992
The EO galaxy M87 harbours the prototypical and most studied example of an optical jet. First observed by Curtis in 1918, it remained little more than a curiosity, until Baade and Minkowski studied it in 1954 and first used the term “jet” to describe the sequence of optical knots extending to about 20″ from the nucleus.
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The EO galaxy M87 harbours the prototypical and most studied example of an optical jet. First observed by Curtis in 1918, it remained little more than a curiosity, until Baade and Minkowski studied it in 1954 and first used the term “jet” to describe the sequence of optical knots extending to about 20″ from the nucleus.
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2018
There are two things about the Hubble Space Telescope that make it stand out and justify giving it a chapter to itself. The first is that when it was launched, it became the most scientifically productive single instrument ever made, with well over 15,000 scientific papers being produced in 20 years.
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There are two things about the Hubble Space Telescope that make it stand out and justify giving it a chapter to itself. The first is that when it was launched, it became the most scientifically productive single instrument ever made, with well over 15,000 scientific papers being produced in 20 years.
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Hubble Space Telescope overview
29th Aerospace Sciences Meeting, 1991A general overview of the performance and current status of the Hubble Space Telescope is presented. Most key spacecraft subsystems are operating well, equaling or exceeding specifications. Spacecraft thermal properties, power, and communications, are superb. The only spacecraft subsystem to have failed, a gyro, is briefly discussed.
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Hubble Space Telescope Data Analysis In Europe
SPIE Proceedings, 1986The Hubble Space Telescope project, a joint project between NASA and ESA, will provide the European astronomical community with a source of high quality astronomical data on a routine basis. Recognizing the fact that data analysis facilities at many astronomical institutions in Europe are not adequate to analyze HST data in an efficient manner, ESA has,
Albrecht R., Russo G.
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The Impact of the Hubble Space Telescope
2020Although impact is an elusive concept, the Hubble Space Telescope has had a measurable effect on culture, not only through its imagery but also through its success in deepening our understanding of the universe and our place in it. Both science and culture would be poorer without its revelations.
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Keeping the Hubble Space Telescope in focus
SPIE Proceedings, 2012The Hubble Space Telescope is a Ritchie-Chretien optical design with a main primary concave mirror followed by a convex secondary. The focus is determined by the position of each of these two mirrors. The truss containing them is made of graphite epoxy which has very low thermal expansion.
Colin Cox, Matthew D. Lallo
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The Life and Times of the Hubble Space Telescope
Frontiers in Optics 2008/Laser Science XXIV/Plasmonics and Metamaterials/Optical Fabrication and Testing, 2008This talk will review past science highlights of the Hubble Space Telescope and describe planned improvements that will significantly enhance the science return of the observatory.
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Technology and the Hubble Space Telescope
2nd Aerospace Maintenance Conference, 1986The components of the Hubble Space Telescope which is a 13.1 m long, 4.27 m in diameter, and weighs 11,000 kg are described. The telescope will be placed in a 600-km circular orbit of 28.5 deg inclination and it has an expected service life of 15 years.
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Advanced camera for the Hubble Space Telescope
SPIE Proceedings, 1998The Advanced Camera for the Hubble Space Telescope has three cameras. The first, the Wide Field Camera, will be a high- throughput, wide field, 4096 X 4096 pixel CCD optical and I-band camera that is half-critically sampled at 500 nm. The second, the High Resolution Camera (HRC), is a 1024 X 1024 pixel CCD camera that is critically sampled at 500 nm ...
F. Bartko +29 more
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Controller redesigns for the Hubble space telescope
Proceedings of 26th Southeastern Symposium on System Theory, 2002Application of multi-input, multi-output (MIMO) design techniques to the Hubble space telescope pointing control system (PCS) controller redesign problem is presented. Improved performance is sought by designing controllers with high, broad-band gain in the disturbance frequency ranges.
Douglas A. Lawrence +4 more
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